<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<div style="width:300px;">
    <div id="Container" style="background:silver; zoom:1;">
        <span id="SPAN1" style="background:gray;">simple text</span>
        <div id="DIV1" style="width:150px; height:50px; background:dimgray;">in flow</div>
        <div id="DIV2" style="float:left; background:gold;">float:left</div>
    </div>
</div>
</body>
</html>